Involute Spline Screw Shaft | High Torque Twin Screw Shaft
High-precision spline shaft designed for maximum torque transmission and fatigue resistance.
Involute spline screw shafts provide optimized load distribution through curved tooth profiles, enabling smooth torque transmission and superior fatigue resistance.
The involute geometry ensures uniform stress distribution along the tooth flank, significantly improving torque capacity and service life compared to straight-sided spline designs.
Manufactured through precision machining or advanced forming processes, involute splines represent the industry standard for modern twin screw extrusion systems.
| Diameter | Ø10-200mm |
| Length | 1000～15000mm |
| L/D Ratio | 1~64D |
| Involute Standard | DIN 5480/ GB/T 3478/ANSI B92.1/ISO 4156/JIS B 1602 |
| Spline Type | Single key / Rectangular Spline / Hexagonal / involute spline / Customized |
| Spline Modulus | 1.5 / 2.0 / 2.5 / 3.0 / 4.0 |
| Material | A40/A70/A80/Stainless |
| Tensile Strength | ≥900 MPa |
| Yield Strength | ≥700 MPa |
| Torque Capacity(Max) | 5～18 |
A: It provides the best combination of torque capacity and durability.
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Six-sided geometry enabling uniform torque transfer and rapid screw element replacement.
Best suited for:
Powder coating
Frequent material changes
Fast screw configuration changes
Robust rectangular spline design providing stable torque transmission with moderate load capacity.
Best suited for:
Medium torque systems
Chemical processing
Replacement applications
Simple keyed design for basic torque transmission in low-load extrusion systems.
Best suited for:
Low torque applications
Legacy extruders
PVC processing
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